[Bug tree-optimization/88398] vectorization failure for a small loop to do byte comparison

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88398

--- Comment #40 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Jiu Fu Guo from comment #39)
> I’m thinking to draft a patch for this optimization.  If any suggestions,
> please point out, thanks.

Which optimization to be precise? Besides unrolling I haven't seen a proposal
for an optimization which is both safe and generally applicable.